Exhaust structure of mold and injection molding apparatus

Abstract

The application discloses a mold exhaust structure and an injection molding equipment, and relates to the technical field of automobile part injection molding. The mold exhaust structure comprises an upper mold piece, a first profiling surface, a lower mold piece, a second profiling surface, a profiling surface and the second profiling surface forming a mold cavity after the upper mold piece and the lower mold piece are closed, and an inclined ejector structure arranged on the lower mold piece. The inclined ejector structure comprises an inclined ejector piece, the inclined ejector piece comprises a first part and a second part, the top surface of the first part is formed as part of the second profiling surface, there is a first height difference between the top surface of the first part and the second profiling surface, the top surface of the second part is formed as part of the parting surface of the lower mold piece, and there is a second height difference between the top surface of the second part and the parting surface. The application effectively utilizes the structure of the inclined ejector piece, achieves the function and effect of exhaust without additionally increasing the exhaust structure, avoids the volume limitation caused by the traditional independent exhaust structure, meets the requirements of product forming structure, and simply and effectively solves the burning defect of the injection molding part.

Description

Technical Field

[0001] This application relates to the field of automotive parts injection molding technology, and in particular to a mold venting structure and injection molding equipment. Background Technology

[0002] In injection molds, in order to effectively solve the problem of scorching defects in injection molded parts, an independent venting structure is required. In order to accommodate the existing venting structure, the volume of the inclined ejector needs to be very large. In addition, the addition of the existing venting structure will make the overall structure inside the mold more complex and increase the processing difficulty. Utility Model Content

[0003] This application aims to solve one of the aforementioned technical problems in the prior art. To this end, embodiments of this application provide a venting structure for a mold.

[0004] This application also provides an injection molding device.

[0005] According to an embodiment of the first aspect of this application, a venting structure for a mold is provided, including an upper mold part having a first contoured surface;

[0006] The lower mold has a second contoured surface. After the upper mold and the lower mold are closed, the contoured surface and the second contoured surface form a cavity.

[0007] An inclined top structure is provided on the lower mold part. The inclined top structure includes an inclined top member, which includes a first part and a second part. The top surface of the first part is formed as part of the second contour surface. There is a first height difference between the top surface of the first part and the second contour surface. The top surface of the second part is formed as part of the parting surface of the lower mold part. There is a second height difference between the top surface of the second part and the parting surface.

[0008] The venting structure of the above-mentioned mold has at least the following beneficial effects: This application optimizes the setting position of the inclined ejector structure, placing the inclined ejector structure at the tip of the mold where trapped gas and scorching defects are prone to occur. The first part of the inclined ejector is formed as part of the second contour surface, and the second part of the inclined ejector is formed as part of the parting surface. A first height difference exists between the top surface of the first part and the second contour surface, and a second height difference exists between the top surface and the parting surface of the second part. After the upper mold part and the lower mold part are closed, the first contour surface and the second contour surface form a cavity. Due to the existence of the first height difference and the second height difference, a venting structure is formed at the edge of the cavity. The molding structure of the inclined ejector itself is effectively utilized, and the venting function is achieved without adding an additional venting structure. This achieves simultaneous optimization of rapid gas discharge and material filling, avoids the volume limitation caused by traditional independent venting structures, meets the requirements of product molding structure, and simply and effectively solves the scorching defect of injection molded parts, effectively reducing product scrap rate and lowering production costs.

[0009] According to the venting structure of the mold described in the first aspect embodiment of this application, both the first height difference and the second height difference are set to 0.01~0.03mm.

[0010] According to the venting structure of the mold described in the first aspect of this application, the inclined ejector structure further includes an ejector rod, which is detachably connected to the inclined ejector.

[0011] According to the venting structure of the mold described in the first aspect of this application, the inclined ejector includes a connecting portion, and the connecting portion is connected to the ejector rod by a fastener.

[0012] According to the venting structure of the mold described in the first aspect of this application, the connecting part is provided with a first mating notch, and the top rod is provided with a second mating notch adapted to the first mating notch.

[0013] According to the venting structure of the mold described in the first aspect of this application, the fastener is a screw;

[0014] The connecting part is provided with a countersunk hole, and the inclined top part is provided with a screw hole;

[0015] Alternatively, the inclined top part is provided with a countersunk hole, and the connecting part is provided with a screw hole;

[0016] The screw passes through the countersunk hole and is threaded into the screw hole.

[0017] According to the venting structure of the mold described in the first aspect of this application, a positioning structure is provided at the connection between the first docking notch and the second docking notch.

[0018] According to the venting structure of the mold described in the first aspect of this application, the positioning structure includes a matching protrusion and a groove;

[0019] The first mating notch is provided with the protruding part, and the second mating notch is provided with the groove;

[0020] Alternatively, the second mating notch may be provided with the protrusion, and the first mating notch may be provided with the groove.

[0021] According to the venting structure of the mold described in the first aspect of this application, the cross-sectional shape of the protrusion is polygonal.

[0022] According to an embodiment of the second aspect of this application, an injection molding apparatus is provided, including the venting structure of the mold described above.

[0023] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0024] The present application will be further described below with reference to the accompanying drawings and embodiments;

[0025] Figure 1 This is a schematic diagram of the structure of the lower module according to an embodiment of this application;

[0026] Figure 2 yes Figure 1 The magnified structure at point A in the middle;

[0027] Figure 3 This is a schematic diagram of the sloping roof structure in an embodiment of this application. Figure 1 ;

[0028] Figure 4 This is a schematic diagram of the sloping roof structure in an embodiment of this application. Figure 2 ;

[0029] Figure 5 This is a schematic diagram of the sloping roof structure in an embodiment of this application. Figure 3 .

[0030] Reference numerals: lower mold part 100, second contour surface 101, parting surface 102, first part 210, second part 220, connecting part 230, screw hole 231, groove 232, first mating notch 233, top rod 240, countersunk hole 241, protrusion part 242, second mating notch 243, screw 250. Detailed Implementation

[0031] This section will describe in detail the specific embodiments of this application. Preferred embodiments of this application are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of this application, but they should not be construed as limiting the scope of protection of this application.

[0032] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0033] In the description of this application, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0034] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0035] The venting structure of the mold provided in this application embodiment includes an upper mold part, a lower mold part 100, and an inclined top structure.

[0036] The upper mold and the lower mold 100 are arranged opposite to each other, and the upper mold can move towards the lower mold 100 to move its nuclear membrane.

[0037] In this embodiment, a first contoured surface is provided on the side of the upper mold facing the lower mold 100, such as... Figure 1 and Figure 2 As shown, the lower mold 100 has a second contour surface 101 on the side facing the upper mold. After the upper mold and the lower mold 100 are closed, a cavity is formed, which is used for injection molding of injection molded products.

[0038] A sloping ejector structure is provided on the lower mold part 100. The sloping ejector structure includes a sloping ejector component for ejecting the injection molded part. In this embodiment, the sloping ejector component includes a first part 210 and a second part 220, as shown below. Figure 1 and Figure 2 As shown, the top surface of the first part 210 is formed as part of the second contour surface 101. There is a first height difference between the top surface of the first part 210 and the second contour surface 101. Under normal circumstances, the edge of the top surface of the first part 210 is seamlessly connected with the second contour surface 101 to form a whole contour surface. The first height difference is set here to facilitate venting during injection molding. Furthermore, the top surface of the second part 220 is formed as part of the parting surface 102 of the lower mold part 100. There is a second height difference between the top surface of the second part 220 and the parting surface 102. Under normal circumstances, the edge of the top surface of the second part 220 is seamlessly connected with the parting surface 102 to form a whole contour surface. The second height difference is set here to facilitate venting during injection molding.

[0039] This application optimizes the placement of the inclined ejector structure, positioning it at the tip of the mold where trapped air and burning defects are likely to occur. The first part 210 of the inclined ejector is formed as part of the second contour surface 101, and the second part 220 of the inclined ejector is formed as part of the parting surface 102. A first height difference exists between the top surface of the first part 210 and the second contour surface 101, and a second height difference exists between the top surface of the second part 220 and the parting surface 102.

[0040] After the upper and lower mold parts 100 are closed, the first and second contoured surfaces 101 form a cavity. Due to the first and second height differences, an venting structure is formed at the edge of the cavity. This effectively utilizes the molding structure of the ejector itself, achieving the venting function without adding an additional venting structure. This optimizes the simultaneous release of gas and material filling, avoiding the volume limitations of traditional independent venting structures, meeting the requirements of the product molding structure, and simply and effectively solving the burning defect of injection molded parts. This also effectively reduces the scrap rate and lowers production costs. Furthermore, this integrated ejector venting design is simple, reliable, low-cost, and easy to maintain.

[0041] It should be noted that the lower mold part 100 is provided with a concave groove for the movement of the inclined ejector. The first part 210 and the second part 220 of the inclined ejector are tightly connected to the concave groove, so that the inclined ejector achieves production stability during the friction process of the ejection movement in the mold cavity, improves the efficiency of use, and reduces failures. At the same time, half of the inclined ejector of the mold is in the cavity and half is at the parting surface 102 of the mold, so that the inclined ejector and the venting are integrated into a design and function. At the same time, the inclined ejector can achieve self-cleaning of the height difference gap formed by the engagement between the inclined ejector and the mold cavity during the ejection and reset movement, avoid carbon accumulation and blockage, facilitate long-term venting of the mold, solve the burning defects of the product, and improve the product qualification rate.

[0042] In some specific embodiments, the first height difference and the second height difference are both set within the range of 0.01~0.03mm. Within this range, serious glue leakage is less likely to occur.

[0043] In some embodiments, the sloping top structure also includes a top member 240, such as Figures 3 to 5 As shown, the top rod 240 and the inclined top member are detachably connected. Existing inclined top members and top rod 240 are designed as a single unit, but due to the significant wear of the inclined top member, frequent replacement is necessary. Replacing the less worn top rod 240 along with it would result in considerable waste. This application makes the inclined top member and top rod 240 detachable. When the inclined top member suffers irreparable wear, only the inclined top member needs to be replaced, eliminating the need to replace the top rod 240, thus reducing maintenance costs.

[0044] In some embodiments, the inclined top member includes a connecting portion 230, which is connected to the top rod member 240 by fasteners. In this embodiment, the first part 210, the second part 220, and the connecting portion 230 are integrally formed structures. The separately extended connecting portion 230 is connected to the top rod member 240 by fasteners. When disassembly is required, the fasteners can be loosened to achieve quick disassembly of the top rod member 240 and the inclined top member.

[0045] In this embodiment, the top rod 240 has a rectangular cross-sectional shape, and the connecting part 230 has the same cross-sectional shape as the top rod 240.

[0046] In some embodiments, such as Figures 3 to 5 As shown, the connecting part 230 is provided with a first mating notch 233, and the top rod 240 is provided with a second mating notch 243 that matches the first mating notch 233. The mating notch is L-shaped, which does not reduce the structural strength of the connection and also facilitates locking the connection with fasteners.

[0047] In this embodiment, the fastener is a screw 250, which connects the connecting part 230 and the top rod 240 together. Specifically, two screws 250 are provided to ensure a more secure connection.

[0048] In some embodiments, the connecting part 230 is provided with a countersunk hole 241, and the inclined top member is provided with a screw hole 231. After the first mating notch 233 and the second mating notch 243 are engaged, the screw 250 passes through the countersunk hole 241 and is threaded into the screw hole 231, thereby connecting the connecting part 230 and the top member 240 together.

[0049] In some other embodiments, the inclined top member is provided with a countersunk hole 241, the connecting part 230 is provided with a screw hole 231, and the screw 250 passes through the countersunk hole 241 and is threaded into the screw hole 231, thereby connecting the connecting part 230 and the top rod member 240 together.

[0050] In some embodiments, a positioning structure is provided at the connection between the first docking notch 233 and the second docking notch 243, so that the first docking notch 233 and the second docking notch 243 can be quickly and easily joined.

[0051] In some embodiments, the positioning structure includes a matching protrusion 242 and a groove 232. The first mating notch 233 is provided with the protrusion 242, and the second mating notch 243 is provided with the groove 232. The first mating notch 233 and the second mating notch 243 are quickly joined by inserting the protrusion 242 into the groove 232.

[0052] In some other embodiments, the second mating notch 243 is provided with a protrusion 242, and the first mating notch 233 is provided with a groove 232. The first mating notch 233 and the second mating notch 243 are quickly joined by inserting the protrusion 242 into the groove 232. The cross-sectional shape of the groove 232 is the same as the cross-sectional shape of the protrusion 242.

[0053] In some embodiments, the cross-sectional shape of the protrusion 242 is polygonal, specifically, the polygon is a triangle, a rectangle, or other polygons. In the embodiment of this application, the cross-sectional shape of the protrusion 242 is rectangular, ensuring that after positioning, the connecting part 230 and the top part will not rotate, facilitating the tightening of the screw 250.

[0054] This application also provides an injection molding device, which includes the above-described mold venting structure.

[0055] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. A venting structure for a mold, characterized in that: include The upper mold part has a first contour surface; The lower mold has a second contoured surface. After the upper mold and the lower mold are closed, the contoured surface and the second contoured surface form a cavity. An inclined top structure is provided on the lower mold part. The inclined top structure includes an inclined top member, which includes a first part and a second part. The top surface of the first part is formed as part of the second contour surface. There is a first height difference between the top surface of the first part and the second contour surface. The top surface of the second part is formed as part of the parting surface of the lower mold part. There is a second height difference between the top surface of the second part and the parting surface.

2. The venting structure of the mold according to claim 1, characterized in that: Both the first height difference and the second height difference are set to 0.01~0.03mm.

3. The venting structure of the mold according to claim 1 or 2, characterized in that: The inclined top structure also includes a top rod, which is detachably connected to the inclined top component.

4. The venting structure of the mold according to claim 3, characterized in that: The inclined top member includes a connecting part, which is connected to the top rod member by fasteners.

5. The venting structure of the mold according to claim 4, characterized in that: The connecting part is provided with a first docking notch, and the top rod is provided with a second docking notch that matches the first docking notch.

6. The venting structure of the mold according to claim 5, characterized in that: The fastener is a screw; The connecting part is provided with a countersunk hole, and the inclined top part is provided with a screw hole; Alternatively, the inclined top part is provided with a countersunk hole, and the connecting part is provided with a screw hole; The screw passes through the countersunk hole and is threaded into the screw hole.

7. The venting structure of the mold according to claim 5, characterized in that: A positioning structure is provided at the connection between the first docking notch and the second docking notch.

8. The venting structure of the mold according to claim 7, characterized in that: The positioning structure includes a matching protrusion and a groove; The first mating notch is provided with the protruding part, and the second mating notch is provided with the groove; Alternatively, the second mating notch may be provided with the protrusion, and the first mating notch may be provided with the groove.

9. The venting structure of the mold according to claim 8, characterized in that: The cross-sectional shape of the protrusion is polygonal.

10. An injection molding machine, characterized in that: The venting structure includes the mold described in any one of claims 1 to 9.

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